Alarm signal holding circuit and device

Abstract

The utility model relates to an alarm signal holding circuit and device, the circuit is used for an electronic dosimeter, and the circuit comprises an alarm signal acquisition unit used for receiving an alarm optical signal emitted by the electronic dosimeter and outputting an alarm electric signal; the signal self-locking unit is connected with the alarm signal acquisition unit and is used for receiving the alarm electric signal and outputting an alarm self-locking signal; a vibration unit connected with the signal self-locking unit and used for receiving the alarm self-locking signal and generating a vibration alarm signal; and the alarm stopping unit is connected with the signal self-locking unit and is used for inputting a self-locking eliminating signal to the signal self-locking unit according to operation. According to the utility model, the alarm effect can be improved, a worker can be ensured to perceive whether the worker works in an area which does not meet the radiation dose requirement, and the personal safety of the worker can be protected.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power engineering, in particular to an alarm signal holding circuit and a device. Background Art

[0002] In the radiation area of ​​a nuclear power plant, electronic personal dosimeters (electronic dosimeters) are needed to monitor the radiation dose received by workers in real time and provide alarms to ensure that workers do not experience overdose events. Existing electronic dosimeters usually have sound and light alarm functions and are generally worn in the worker's chest pocket. However, due to the noise in the on-site environment, workers need to wear earplugs and additional protective equipment, which results in the sound and light information after the electronic dosimeter alarm is obscured. It is common for workers to fail to perceive the electronic dosimeter alarm in time, resulting in additional radiation doses for personnel, endangering their personal safety. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an alarm signal holding circuit and device.

[0004] The technical solution adopted by the present invention to solve the technical problem is to construct an alarm signal holding circuit for an electronic dosimeter, the alarm signal holding circuit comprising:

[0005] An alarm signal acquisition unit for receiving the alarm light signal emitted by the electronic dosimeter and outputting an alarm electrical signal;

[0006] A signal self-locking unit connected to the alarm signal acquisition unit, configured to receive the alarm electrical signal and output an alarm self-locking signal;

[0007] a vibration unit connected to the signal self-locking unit and configured to receive the alarm self-locking signal and generate a vibration alarm signal; and

[0008] An alarm stop unit is connected to the signal self-locking unit and is used to input a self-locking cancellation signal to the signal self-locking unit according to an operation.

[0009] Preferably, the vibration unit includes a vibration motor P4; the vibration motor P4 is connected to the signal self-locking unit.

[0010] Preferably, the alarm signal acquisition unit includes a photoresistor RT1, a fourth resistor R4 and a sixth resistor R6; one end of the photoresistor RT1 is connected to the first end of the fourth resistor R4 and the other end is grounded, the second end of the fourth resistor R4 is connected to the signal self-locking unit and is connected to the DC voltage through the sixth resistor R6.

[0011] Preferably, the signal self-locking unit includes:

[0012] a processing unit connected to the alarm signal acquisition unit and the alarm stop unit, configured to receive the alarm electrical signal and the self-locking cancellation signal and output a conduction signal; and

[0013] A switch unit connected to the processing unit and the vibration unit, and configured to receive the conduction signal and control the on / off power supply of the vibration unit.

[0014] Preferably, the processing unit includes a processor U1, a first capacitor C1 and a second capacitor C2; the power supply end of the processor U1 is connected to the alarm stop unit, and the power supply end of the processor U1 is also connected to the ground via the first capacitor C1, the second capacitor C2 is connected in parallel with the first capacitor C1, the ADC port of the processor U1 is connected to the alarm signal acquisition unit, and the IO port of the processor U1 is connected to the switch unit.

[0015] Preferably, the switching unit includes a switching tube Q3 and an eighth resistor R8; the control end of the switching tube Q3 is connected to the processing unit via the eighth resistor R8, the input end of the switching tube Q3 is connected to the ground end of the vibration unit, and the output end of the switching tube Q3 is grounded. When the switching tube Q3 receives the conduction signal, it connects the connection between the ground end of the vibration unit and the ground.

[0016] Preferably, the alarm signal holding circuit further includes:

[0017] A battery unit is used to supply power to the vibration unit and the signal self-locking unit, wherein the battery unit is connected to the signal self-locking unit and the vibration unit via the alarm stop unit.

[0018] Preferably, the alarm stop unit includes a switch S1; a first end of the switch S1 is connected to the battery unit, and a second end of the switch S1 is connected to the signal self-locking unit and the vibration unit.

[0019] Preferably, the alarm signal holding circuit further includes:

[0020] An anti-reverse unit is used to prevent current from flowing back to the battery unit, and the second end of the switch S1 is connected to the signal self-locking unit and the vibration unit through the anti-reverse unit.

[0021] The utility model also constructs an alarm signal holding device, comprising:

[0022] Electronic personal dosimeters; and

[0023] The alarm signal holding circuit described above.

[0024] The implementation of the utility model has the following beneficial effects: an alarm signal holding circuit is provided, which outputs an alarm electrical signal through the alarm signal acquisition unit when the electronic dosimeter emits a light alarm signal, and then continuously outputs an alarm self-locking signal that can control the vibration unit to generate a vibration alarm signal through the signal self-locking unit when the alarm electrical signal is received, until the staff notices it and operates the alarm stop unit, the vibration unit will stop sending the vibration alarm signal. The utility model can improve the alarm effect and ensure that the staff can detect whether they are working in an area that does not meet the radiation dose requirements, so that the staff can take corresponding protective measures, which plays a role in protecting the personal safety of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0026] Figure 1 This is a circuit structure block diagram of the alarm signal holding circuit in some embodiments of the present utility model;

[0027] Figure 2 This is a circuit schematic diagram of the alarm signal acquisition unit, the signal self-locking unit, and the vibration unit in some embodiments of the present utility model;

[0028] Figure 3 This is a circuit schematic diagram of the alarm stop unit, battery unit and anti-reverse unit in some embodiments of the present utility model. DETAILED DESCRIPTION

[0029] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings.

[0030] In the following description, it should be understood that the directions or positional relationships indicated by “front”, “back”, “up”, “down”, “left”, “right”, “longitudinal”, “horizontal”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “head”, and “tail” are based on the directions or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific direction. They are only for the convenience of describing the technical solution, and do not indicate that the device or element referred to must have a specific direction. Therefore, they cannot be understood as a limitation on the present utility model.

[0031] The utility model provides an alarm signal holding circuit, which is applied to an electronic dosimeter and can generate a continuous vibration alarm signal when the electronic dosimeter sends a light alarm signal. The vibration alarm signal will not stop until it is noticed and turned off by a staff member.

[0032] It should be noted that the electronic dosimeter may be an existing electronic personal dosimeter, which is capable of monitoring the radiation dose at the site and emitting an alarm light signal (such as a flashing red light) when the radiation dose exceeds a threshold.

[0033] See Figure 1 The alarm signal holding circuit may include a signal acquisition unit 1, a signal self-locking unit 2, a vibration unit 3 and an alarm stop unit 4.

[0034] See Figure 1 The alarm signal acquisition unit 1 is used to receive the alarm light signal emitted by the electronic dosimeter and output an alarm electrical signal. The function of the alarm signal acquisition unit 1 is to output an alarm electrical signal when receiving the alarm light signal, which is equivalent to converting the optical signal output by the electronic dosimeter into an electrical signal.

[0035] In some embodiments, as Figure 2 As shown, the alarm signal acquisition unit 1 may include a photoresistor RT1, a fourth resistor R4, and a sixth resistor R6. One end of the photoresistor RT1 is connected to the first end of the fourth resistor R4, the other end of the photoresistor RT1 is grounded, and the second end of the fourth resistor R4 is connected to the signal self-locking unit 2 and is connected to a DC voltage via the sixth resistor R6.

[0036] See Figure 2 The working principle of the alarm signal acquisition unit 1 is as follows: the photoresistor RT1 is set to be opposite to the light signal emission port of the electronic dosimeter, so that when the electronic dosimeter emits an alarm light signal, the photoresistor RT1 will show a significant resistance change; because the sixth resistor R6, the fourth resistor R4 and the photoresistor RT1 form a voltage divider circuit for dividing the DC voltage, the change in the resistance of the photoresistor RT1 will cause the voltage at the second end of the fourth resistor R4 to change accordingly, and this changing voltage signal corresponds to the alarm electrical signal. It can be understood that the signal self-locking unit 2 can determine whether the alarm electrical signal is received by detecting the voltage at the second end of the fourth resistor R4. Assuming that the resistance of the photoresistor RT1 will decrease rapidly when it is irradiated by the alarm light signal, the voltage at the second end of the fourth resistor R4 will also decrease accordingly. Therefore, when the signal self-locking unit 2 detects that the voltage at the second end of the fourth resistor R4 is less than a preset voltage threshold, it can be determined that the alarm electrical signal output by the alarm signal acquisition unit 1 has been received.

[0037] See Figure 1, the signal self-locking unit 2 is connected to the alarm signal acquisition unit 1, and the signal self-locking unit 2 is used to receive the alarm electrical signal and output the alarm self-locking signal. The function of the signal self-locking unit 2 is to continuously output the alarm self-locking signal when receiving the alarm electrical signal, and will not stop outputting the alarm self-locking signal until it receives the self-locking elimination signal output by the alarm stop unit 4. It should be noted that after the signal self-locking unit 2 receives the alarm electrical signal, even if the alarm signal acquisition unit 1 stops outputting the alarm self-locking signal, the signal self-locking unit 2 will not stop outputting the alarm self-locking signal before receiving the self-locking elimination signal, which is equivalent to realizing the self-locking of the alarm electrical signal. This is to ensure that the electronic dosimeter can be perceived by the staff and protect the personal safety of the staff.

[0038] It should be noted that during work, staff may work back and forth between areas that do not meet the radiation dose requirements and areas that do meet the radiation dose requirements. If the staff walks out of the area that does not meet the radiation dose requirements, the alarm self-locking signal will stop being output, and it is easy to ignore the hazards of the area that does not meet the radiation dose requirements. It is understandable that self-locking after receiving the alarm electrical signal will help improve the alarm effect and ensure that the staff can be aware that they are working in an area that does not meet the radiation dose requirements so that they can take corresponding protective measures.

[0039] In some embodiments, as Figure 2 As shown, the signal self-locking unit 2 may include a processing unit 21 and a switch unit 22 .

[0040] See Figure 2 The processing unit 21 is connected to the alarm signal acquisition unit 1 and the alarm stop unit 4. The processing unit 21 is used to receive the alarm electrical signal and the self-locking cancellation signal and output the conduction signal. The processing unit 21 is configured to output a continuous conduction signal upon receiving the alarm electrical signal output by the alarm signal acquisition unit 1, and to stop outputting the conduction signal upon receiving the self-locking cancellation signal output by the alarm stop unit 4.

[0041] In some embodiments, as Figure 2 As shown, the processing unit 21 may include a processor U1, a first capacitor C1, and a second capacitor C2. The power supply end of the processor U1 is connected to the alarm stop unit 4, and the power supply end of the processor U1 is also connected to the ground via the first capacitor C1. The second capacitor C2 is connected in parallel with the first capacitor C1. The ADC port of the processor U1 is connected to the alarm signal acquisition unit 1, and the IO port of the processor U1 is connected to the switch unit 22.

[0042] See Figure 2The working principle of the processing unit 21 is as follows: the processor U1 monitors the voltage at the second end of the fourth resistor R4 included in the alarm signal acquisition unit 1 in real time through its ADC port. When the voltage is less than the preset voltage threshold, the processor U1 will be informed that the alarm signal acquisition unit 1 has output an alarm electrical signal. At this time, the processor U1 will output a continuous conduction signal to the switch unit 22 through its IO port. When the processor U1 receives the self-locking cancellation signal output by the alarm stop unit 4, it will stop outputting the conduction signal due to power failure.

[0043] In some embodiments, the first capacitor C1 can be a 10uF capacitor, which is used to reduce the ripple of the input power to the power supply terminal of the processor U1 and improve the power supply stability of the processor U1. The first capacitor C1 can be a 0.1uF capacitor, which is used to filter the input power.

[0044] In some embodiments, the processor U1 may be a processor of model STC8G1K08A.

[0045] See Figure 2 The switch unit 22 is connected to the processing unit 21 and the vibration unit 3. The switch unit 22 is used to receive the conduction signal and control the power supply of the vibration unit 3. The function of the switch unit 22 is to control whether the vibration unit 3 is working by controlling the power on or off of the vibration unit 3.

[0046] In some embodiments, as Figure 2 As shown, the switch unit 22 includes a switch tube Q3 and an eighth resistor R8. The control terminal of the switch tube Q3 is connected to the processing unit 21 via the eighth resistor R8. The input terminal of the switch tube Q3 is connected to the ground terminal of the vibration unit 3. The output terminal of the switch tube Q3 is grounded. When the switch tube Q3 receives a conduction signal, it connects the ground terminal of the vibration unit 3 to the ground.

[0047] See Figure 2 The operating principle of the switch unit 22 is as follows: When the processing unit 21 outputs a conduction signal, the switch tube Q3 is turned on, thereby connecting the ground terminal of the vibration unit 3 to the ground, and the vibration unit 3 is put into operation. It can be understood that when the ground terminal of the vibration unit 3 is disconnected from the ground, the vibration unit 3 will lose power and become inoperable because it cannot form a circuit with its power supply, and thus cannot generate a vibration alarm signal.

[0048] In some embodiments, the switch Q3 is an NPN transistor or an NMOS transistor. Due to the low cost of transistors, the switch Q3 is preferably an NPN transistor to save costs. Accordingly, when the switch Q3 is an NPN transistor, the control terminal, input terminal, and output terminal of the switch Q3 correspond to the positive electrode, collector, and emitter of the NPN transistor, respectively.

[0049] See Figure 1 The vibration unit 3 is connected to the signal self-locking unit 2. The vibration unit 3 is used to receive the alarm self-locking signal and generate a vibration alarm signal. The function of the vibration unit 3 is to output a vibration alarm signal when receiving the alarm self-locking signal. It can be understood that if the vibration unit 3 has direct or indirect contact with the body of the staff member, the vibration alarm signal is easier to detect than the sound and light alarm signal (similar to the vibration function of a mobile phone for incoming calls), thereby improving the alarm effect.

[0050] In some embodiments, as Figure 2 As shown, the vibration unit 3 may include a vibration motor P4. The positive terminal of the vibration motor P4 is connected to a DC voltage, and the negative terminal of the vibration motor P4 is connected to the signal self-locking unit 2. The vibration motor P4 may be an existing vibration motor, and the negative terminal of the vibration motor P4 serves as the ground terminal of the vibration unit 3. It is understood that when the vibration unit 3 is powered, it generates a vibration alarm signal, and when it loses power, it stops outputting the vibration alarm signal.

[0051] See Figure 1 The alarm stop unit 4 is connected to the signal self-locking unit 2 and is used to input a self-locking cancellation signal to the signal self-locking unit 2 according to the operation. The function of the alarm stop unit 4 is that when the staff operates it, it inputs a self-locking cancellation signal to the signal self-locking unit 2, thereby causing the signal self-locking unit 2 to stop outputting the alarm self-locking signal.

[0052] In some embodiments, the alarm signal holding circuit may further include: Figure 3 The battery unit 5 shown. The battery unit 5 is connected to the signal self-locking unit 2 and the vibration unit 3 via the alarm stop unit 4, and the battery unit 5 is used to supply power to the vibration unit 3 and the signal self-locking unit 2. The battery unit 5 can be a battery cluster composed of a plurality of batteries, and the supply voltage of the battery unit 5 can be between 2.9V and 5V. In this embodiment, the alarm stop unit 4 can control whether the battery unit 5 supplies power to the vibration unit 3 and the signal self-locking unit 2, that is, the staff can control the power on or off of the signal self-locking unit 2 and the vibration unit 3 by operating the alarm stop unit 4, thereby directly controlling whether the vibration unit 3 continues to output the vibration alarm signal.

[0053] In some embodiments, as Figure 3As shown, the alarm stop unit 4 may include a switch S1. The first end of the switch S1 is connected to the battery unit 5, and the second end is connected to the signal self-locking unit 2 and the vibration unit 3. In this embodiment, the switch S1 can be manually switched (such as a rocker switch, etc.), so that the staff can control the on and off of the signal self-locking unit 2 and the vibration unit 3 by operating the switch S1. It should be noted that after the switch S1 is disconnected, the vibration unit 3 will stop outputting the vibration alarm signal due to power failure, and the processor U1 in the signal self-locking unit 2 will be reset due to power failure, that is, the processor U1 will not output the alarm self-locking signal after restarting and before receiving the alarm electrical signal.

[0054] Since the vibration motor P4 outputs an inductive load, when it is turned on and off, a reverse electromotive force will appear. If the battery included in the battery unit 5 is a dry cell, inputting a reverse current to the dry cell may cause damage to the dry cell or even cause fire and explosion. To improve safety, in some embodiments, the alarm signal holding circuit may further include the following: Figure 3 The anti-reverse unit 6 is shown. The anti-reverse unit 6 is used to prevent current from flowing back to the battery unit 5. The second end of the switch S1 is connected to the signal self-locking unit 2 and the vibration unit 3 through the anti-reverse unit 6.

[0055] Furthermore, if Figure 3 As shown, the anti-reverse unit 6 may include a diode D1, the anode of the diode D1 is connected to the second end of the switch S1, and the cathode of the diode D1 outputs the DC voltage VCC and is simultaneously connected to the power supply end of the processor U1 included in the signal self-locking unit 2 and the positive pole of the vibration motor P included in the vibration unit 3.

[0056] It can be understood that the present invention can improve the alarm effect, ensuring that workers can detect whether they are working in an area that does not meet the radiation dose requirements, so that workers can take corresponding protective measures, thereby playing a role in protecting the personal safety of workers.

[0057] The utility model also provides an alarm signal holding device, which may include an electronic personal dosimeter and an alarm signal holding circuit provided in an embodiment of the utility model.

[0058] In some embodiments, the alarm signal holding device may further include a housing for housing the alarm signal holding circuit. The switch S1 included in the alarm stopping unit 4 and the photoresistor RT1 included in the alarm signal acquisition unit 1 are disposed on the housing to facilitate operator operation of the alarm stopping unit 4. The photoresistor RT1 is also disposed at a position opposite to the optical signal emission port of the electronic personal dosimeter.

[0059] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. An alarm signal holding circuit for an electronic dosimeter, characterized in that: The alarm signal holding circuit comprises: An alarm signal acquisition unit (1) for receiving an alarm light signal emitted by the electronic dosimeter and outputting an alarm electrical signal; A signal self-locking unit (2) connected to the alarm signal acquisition unit (1) and used to receive the alarm electrical signal and output an alarm self-locking signal; a vibration unit (3) connected to the signal self-locking unit (2) and used to receive the alarm self-locking signal and generate a vibration alarm signal; and An alarm stop unit (4) is connected to the signal self-locking unit (2) and is used to input a self-locking elimination signal to the signal self-locking unit (2) according to an operation.

2. The alarm signal holding circuit according to claim 1, characterized in that: The vibration unit (3) includes a vibration motor P4; the vibration motor P4 is connected to the signal self-locking unit (2).

3. The alarm signal holding circuit according to claim 1, characterized in that: The alarm signal acquisition unit (1) comprises a photoresistor RT1, a fourth resistor R4 and a sixth resistor R6; one end of the photoresistor RT1 is connected to the first end of the fourth resistor R4 and the other end is grounded; the second end of the fourth resistor R4 is connected to the signal self-locking unit (2) and is connected to a DC voltage via the sixth resistor R6.

4. The alarm signal holding circuit according to claim 1, characterized in that: The signal self-locking unit (2) comprises: a processing unit (21) connected to the alarm signal acquisition unit (1) and the alarm stop unit (4), configured to receive the alarm electrical signal and the self-locking elimination signal and output a conduction signal; and A switch unit (22) connected to the processing unit (21) and the vibration unit (3) and used to receive the conduction signal and control the power supply on and off of the vibration unit (3).

5. The alarm signal holding circuit according to claim 4, characterized in that: The processing unit (21) includes a processor U1, a first capacitor C1, and a second capacitor C2; a power supply end of the processor U1 is connected to the alarm stop unit (4), the power supply end of the processor U1 is also connected to the ground via the first capacitor C1, the second capacitor C2 is connected in parallel with the first capacitor C1, the ADC port of the processor U1 is connected to the alarm signal acquisition unit (1), and the IO port of the processor U1 is connected to the switch unit (22).

6. The alarm signal holding circuit according to claim 4, characterized in that: The switch unit (22) comprises a switch tube Q3 and an eighth resistor R8; the control end of the switch tube Q3 is connected to the processing unit (21) via the eighth resistor R8, the input end of the switch tube Q3 is connected to the ground end of the vibration unit (3), the output end of the switch tube Q3 is grounded, and the switch tube Q3 connects the connection between the ground end of the vibration unit (3) and the ground when receiving the conduction signal.

7. The alarm signal holding circuit according to any one of claims 1 to 6, characterized in that: Also includes: A battery unit (5) for supplying power to the vibration unit (3) and the signal self-locking unit (2), wherein the battery unit (5) is connected to the signal self-locking unit (2) and the vibration unit (3) via the alarm stop unit (4).

8. The alarm signal holding circuit according to claim 7, characterized in that: The alarm stop unit (4) comprises a switch S1; a first end of the switch S1 is connected to the battery unit (5), and a second end of the switch S1 is connected to the signal self-locking unit (2) and the vibration unit (3).

9. The alarm signal holding circuit according to claim 8, characterized in that: Also includes: An anti-reverse unit (6) is used to prevent current from flowing back to the battery unit (5), and the second end of the switch S1 is connected to the signal self-locking unit (2) and the vibration unit (3) via the anti-reverse unit (6).

10. An alarm signal holding device, characterized in that: include: electronic personal dosimeters; as well as The alarm signal holding circuit according to any one of claims 1 to 9.

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